code and stutter

[boost3]

P0139 thats a code im getting.I am also getting liek stutter hesitation at high rpms.I have he 1 step colder plugs and stretched the coils.Im gona try changing my spark plugs again...

[AutoXRacer]

What year is your car and how many miles do you have on it?
Any mods?

[SharkDiver]

Why do you have 1 step colder plugs?Also like autoX said,Mods?

[tru-boost]

i bet your plug gap is too big. put it between .027 and .030